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Radiation interception, extinction coefficient and use efficiency of wheat crop at various irrigation and nitrogen levels in a semiarid location

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Title Radiation interception, extinction coefficient and use efficiency of wheat crop at various irrigation and nitrogen levels in a semiarid location
Not Available
 
Creator Pradhan, S.
Sehgal, V.K., Bandyopadhyay, K.K., Panigrahi, P., Parihar, C.M. and Jat, S.L.
 
Subject Radiation interception Radiation extinction coefficient RUE Wheat
 
Description Not Available
Abstract Field experiments were conducted to study the
effect of irrigation and nitrogen levels on radiation use
efficiency (RUE), radiation extinction coefficient (j) and
temporal variation of leaf area index (LAI) and fraction
intercepted photosynthetically active radiation (fIPAR).
The LAI of wheat increased with increase in irrigation and
nitrogen levels. The fIPAR also followed trend similar to
LAI. The LAI and fIPAR showed logarithmic relationship
with R2 value of 0.92 and 0.93 for the years 2013–2014 and
2014–2015, respectively. The j value varied between 0.41
and 0.78 and was significantly affected by nitrogen levels
but was not influenced by irrigation levels. The grain and
above ground biomass (AGB) yields of wheat were not
affected significantly by irrigation levels. However, application of 160 kg N ha-1 (N160) registered higher grain
(12–33%) and AGB (22–25%) yeilds as compared to that
with application of 40 kg N ha-1 (N40). Similar to AGB,
the total intercepted photosynthetically active radiation
(TIPAR) was not affected by irrigation levels but N160
treatment registered 9–20% higher TIPAR compared to
N40 treatment. The linear relationship between TIPAR and
AGB revealed that 83–86% variation in AGB yield of
wheat can be explained by TIfIPAR. The RUE of wheat
under three irrigations (I3) was 6 and 18% higher
(P\ 0.05) than the five (I5) and two (I2) irrigation
treatments, respectively for the year 2013–2014. However,
there was no significant effect of irrigation on RUE of
wheat in the year 2014–2015. N160 treatment registered
5–13% higher RUE than the N40 treatment. Thus wheat
may be grown with three irrigations (CRI, flowering and
grain filling) and 160 kg N ha-1 for higher RUE without
significant reduction in AGB of wheat compared to five
irrigation levels in semi-arid location of Delhi region.
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Date 2019-11-02T04:47:16Z
2019-11-02T04:47:16Z
2018-09-29
 
Type Article
 
Identifier Pradhan, S., Sehgal, V.K., Bandyopadhyay, K.K., Panigrahi, P., Parihar, C.M. and Jat, S.L. 2018. Radiation interception, extinction coefficient and use efficiency of wheat crop at various irrigation and nitrogen levels in a semi-arid location. Indian Journal of Plant Physiology, 23(3): 416-425
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http://krishi.icar.gov.in/jspui/handle/123456789/24271
 
Language English
 
Relation Not Available;
 
Publisher springer